Why do things happen!

Why does love happen,
Is it an impulse action.
It tugs heart lightly,
Yet disappears fast.
Why does anger happen,
Who makes it terrifying.
Is it the insanity within,
Making part as a whole.
Why does joy come forth,
Is it because of mere sense.
It makes the heart lighter,
Through miles of emotions.
Why does life happen,
Is it just for existence.
The purpose is to feel,
The fall before the winter.